This shop, the closest one to the entrance from the alley behind the Leaky Cauldron, sells all sorts of cauldrons. Outside the shop, a stack of them shines in the sun, under a sign that reads:

Cauldrons
All sizes
Copper, Brass, Pewter, Silver
Self-Stirring
Collapsible

A dimly lit shop which, according to the sign, sells tawny, screech, barn, brown, and snowy owls.

An ice cream parlor with outdoor tables.

A large wizarding bookshop filled with shelves stacked to the ceiling, Flourish & Blotts is the primary - and perhaps only - supplier of textbooks for Hogwarts, though of course that's far from all they sell. The shop holds occasional book-signings, such as when Gilderoy Lockhart stopped by in 1992, and sells books via owl in addition to books purchased in-store.

Madam Malkin's is located next door to Flourish & Blotts, and in addition to selling Hogwarts school robes, they also sell robes which are spangled, self-ironing, beautifying, slimming, fattening, lengthening and temperature-adjusting and they carry robes made by Whopperwear "for the outsize witch or wizard." A later advertisement states that every robe sold at the store is self-ironing and repairing as well.

A company that helps witches remove warts and worse. Madam Primpernelle's is located at 275, Diagon Alley.

A very crowded pet store, noisy with the sounds of all the animals. This is the shop to go to for cats, rats, toads, and any other animal which can be considered a pet.

"Makers of Fine Wands since 382 B.C,"
Ollivander's is a narrow and shabby little shop with a window display consisting of a single wand resting on a faded purple cushion. Inside the walls are lined floor to ceiling with thousands of narrow boxes, which Mr. Ollivander chooses from when trying to find a wand to match each customer.

Sellers of Quidditch supplies and brooms.

Next door to Quality Quidditch Supplies, this store sells ink, quills, and parchment.